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Q1. If the four-engine jet accelerates down the runway at 4 m/s2 and one of the jet engines fails, how much acceleration would the other three produce?
Q2. A 30 kg loudspeaker is suspended 3.0 m below the ceiling by two cables that are each 60 degrees from vertical. What is the tension in the cables?
Q3. A child and sled with a combined mass of 49.20 kg slide down a frictionless hill that is 7.38 m high. If the sled starts from rest, what is its speed at the bottom of hill?
Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 71 km/h while car B travels at a constant speed of 90 km/h. how faris car A from school 2.2 h later.
A magnifying lens with a focal length of 5 cm is held 4 cm from an object that is 1cm tall. Find the image distance from the lens
When diving for prey, bald eagles can reach speeds of 200 mph (322 km/h). Suppose a 6.0kg eagle flying horizontally at 322 km/h suddenly grasps, What's the eagle's speed just after grasping the rabbit
A current of 7.35 A in a solenoid of length 12.2 cm creates a 0.397-T magnetic field, How many turns does this solenoid contain
A worker stands still on a roof sloped at an angle of 23° above the horizontal. He is prevented from slipping by a static frictional force of 540 N. Find out the mass of the worker.
A 10 m beam of mass 330 kg extends over a ledge. The beam is not attached, but simply rests on surface. A 53 kg student intends to position the beam so that he can walk to the end of it. How far from the edge of the ledge can the beam extend.
Bob walks up to the crate and begins pushing with 200N of force. What is the magnitude of the frictional force now
A lens has diameter of 30 mm, What is the lens' theoretical resolution limit (in nm) when it is used in air with light of 550-nm wavelength
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.32s, What is the weight of the grapes
A hot piece of copper (cc = 386J/kg·K) of mass mc = 3kg and unknown initial temperature Tc is dropped into a container of water (cw = 4186 J/kg · K) of mass mw = 1 kg, What is the initial temperature Tc of the copper
A 50 newton horizontal force pushes a 10 kg mass sitting on a horizontal surface. What is the acceleration of the mass
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